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Adaptive fuzzy PID controllers, combining fuzzy controllers which are highly adaptable with conventional PID controllers which have no control error, have been used in vector control systems of permanent synchronous machines(PMSM). In this paper, an adaptive fuzzy PID controller of which membership functions are dramatically improved is designed and applied to a PMSM. Then, simulation in Simulink...
This paper is intended to compare and study the operation of two methods for estimating the position and speed of the rotor salient pole synchronous system in a sliding mode control motor. The first method (MRAS) is based on the dynamic model of the salient pole PMSM, formulated in a reference frame linked to the rotor. The second method, based on a nonlinear Luenberger extended observer is used to...
Permanent-magnet synchronous-motor is a multi-variable, non-linear, strong coupling system that is highly sensitive to the outer interfere and inter perturbation. To improve the system robustness, the non-linear mapping is built based on the properties of local time frequency characteristics, zooming index, adaptive study, strong robustness and non-linear approaching of wavelet neural network. By...
This paper presents a leading angle flux-weakening control method for the wide-speed operation of permanent magnet synchronous motor (PMSM). The angle offset of flux-weakening is gained by integraling the error of given index and calculation index, which is the utilization of motor's terminal voltage to the voltage of DC bus, and then a voltage loop is established to maintain the stability of flux-weakening...
A Robust Current-Loop Controller (RCLC) based on the theory of Sliding Model Control (SMC) for Permanent Magnet Synchronous Motors (PMSMs) is proposed in this paper. The Field Oriented Control (FOC) scheme for PMSMs drive is constructed to achieve the better performance. Meanwhile in order to damp the chattering brought by the basic principle of SMC, three ways are presented, which can ensure the...
In this paper, a robust MIMO output control law for Permanent Magnet Synchronous Machines (PMSM) is considered. The nonlinear model of the motor is presented, and a control strategy is proposed, based on high order sliding manifold dynamic output control concepts. A rigorous proof of the stability is presented, based on nonlinear Lyapunov theory and fuzzy mathematics tools (although the controller...
There are big ripples on current and flux linkage and electromagnet torque under traditional direct torque control (DTC) on motor drive system. To solve these problems, fuzzy controller is designed to instead traditional hysteretic comparator, and zero voltage vectors are used to further reduce ripples. Rotor speed is estimated online by extended Kalman filter (EKF) algorithm. Speed sensorless DTC...
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